KmanKaiser, I thought I had golden ears as well (I was able to tell the difference between 320 CBR LAME and 320 CBR Fraunhofer with a 4 hour ABX test), until I started ABX everything and I didn't care anymore, ABX will destroy your ego.

I reconverted everything in FLAC for archival purposes and cared about size only for portable use, ending up using ~115 Kbps AAC True VBR for my iPhone and car.